Šebenik, Urša, Mitja Brilly, and Mojca Šraj. “Drought Analysis Using the Standardized Precipitation Index (SPI)”. Acta geographica Slovenica 57, no. 1 (January 1, 2017): 31–49. Accessed April 16, 2024. https://ojs.zrc-sazu.si/ags/article/view/729.